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Alleycat_Joe · Joined: 14 Sep 2020 Posts: 21 Location: Florida

Considering I have found no sources for rod bolts, I'm looking at two options: ARP 275-6001 or off-the-shelf M10x1 Class 12.9 Allen Bolts with "High-Torque" 12 point nuts. ARP is rated to 220ksi where 12.9 is 170ksi, no value on the nuts. The ARP bolts seem to fit based on measurements I received via email from ARP with about 2mm of the retaining sleeve fitting into the rod cap (is that enough?). The off-the-shelf options are easily acquired and much cheaper, tolerance might be the only issue, but measurements indicate they should fit just as well as original rod bolts (length, retaining sleeve, head diameter etc.). Has anyone tried the BMW bolts, I have read mentions of it on our forum, but no follow-through? Comments on either option? Let me know if I'm off-base, I'm willing to listen and learn.

Links to all hardware mentioned below:

https://arp-bolts.com/kits/arpkit-detail.php?RecordID=4937

https://www.mcmaster.com/96144A267/
https://www.mcmaster.com/90759A800/
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1980 931 | 1981 240D 4spd

Carrera RSR · Joined: 08 Jan 2010 Posts: 2312 Location: Somerset, UK

Porsche will sell you new rod bolts again. Previously NLA. Similar price to the previous ARP group buys
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
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MikeJinCO · Posted: Sat Feb 20, 2021 6:04 am Post subject:

I have a set of ARP rod bolts left over fromour group buy last year.
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Mike

'67 MG Midget Dp
'71 Ocelot Dsr Kawasaki 1000(under rebuild)